Why does ice floats on water?
The mass per unit volume of a substance is called density (density = mass/volume). As the volume of a substance... View Article
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The colour of KMnO4 is due to:
The colour of KMnO4 is due to charge transfer transitions by absorption of visible light. Why is KMnO4 coloured? KMnO4 has a... View Article
Lead loses its lustre due to:
The corrosion of the lead surface is responsible for it losing its lustre. The metals lose their shine on brightness... View Article
Butane has molecular formula:
Butane has four carbon atoms and follows the general formula CnH2n+2. Butane(C4H10) is a gas at room temperature and atmospheric... View Article
Alluvial soil is a mixture of ________
Alluvial soil is a mixture of sand, silt, clay. What is alluvial soil? Alluvial soil is one of the best... View Article
Which is insoluble in water ?
Calcium carbonate is insoluble in water. Elementary calcium reacts with water at room temperature, according to the following reaction mechanism:... View Article
Anodising is done in case of:
Anodizing is the process of forming a thick oxide layer of aluminium. This aluminium oxide coat makes it resistant to... View Article
What are good conductors of heat?
Answer: Materials that allow heat to pass through them easily are called good conductors of heat. Metals like copper and... View Article
Name the long part of neuron.
Axon is the longest part of the neuron. Basic parts of a Neuron Neurons (also called neurones or nerve cells)... View Article
The S.I unit of viscosity is:
The SI unit of viscosity is Nm-2s. What is viscosity Viscosity is an important property of fluid foods. It is... View Article
What is the density of water?
The density of water is 1 g cm-3 How is density measured? We define density (ρ) as the ratio of... View Article
The S.I. unit of momentum is______
Answer: The unit of momentum is Kg ms-1. Momentum and it’s unit The momentum, p of an object is defined... View Article
Which gas is abundant in air?
Nitrogen is abundant in the air. What is in the atmosphere? The most abundant gas in the atmosphere is nitrogen,... View Article
Humans are _____ animals
Humans are warm-blooded or endothermal animals who can maintain a more or less constant body temperature, irrespective of the surrounding... View Article
Water is a ________
Answer: Water is a compound of hydrogen and oxygen. Water is a pure substance and not a mixture. Water forms whenever two or more atoms form... View Article
What is the importance of DNA copying?
Solution: DNA determines the body design of an individual. The DNA that gets transferred from parents to offspring makes them... View Article
What makes the blood look red?
Answer: The presence of a red pigment called haemoglobin in red blood cells (RBC) makes the blood look red. Haemoglobin... View Article
The Brownian motion is due to:
The Brownian motion is due to the impact of molecules of the dispersion medium on the colloidal particles. Brownian motion... View Article
Baking powder is a mixture of:
Baking powder is a mixture of carbonate or bicarbonate and a weak acid. Baking powder and its uses A mixture contains different types... View Article
A gold leaf electroscope can :
A gold-leaf electroscope can detect the presence of charge and test the kind of charge. Gold leaf electroscope The gold-leaf... View Article
